1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
|
/*
This file is part of the TDE project
Copyright (C) 2011 Timothy Pearson <kb9vqf@pearsoncomputing.net>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <dirent.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/select.h>
#include <sys/time.h>
#include <termios.h>
#include <signal.h>
#include <tqstring.h>
#include "config.h"
#define FIFO_FILE "/tmp/ksocket-global/tsak"
// #define DEBUG
int main (int argc, char *argv[])
{
int mPipe_fd;
char readbuf[128];
int numread;
pid_t parentproc = getppid();
#ifdef DEBUG
printf("Parent pid is: %d\n\r", parentproc);
#endif
char parentexecutable[8192];
TQString procparent = TQString("/proc/%1/exe").arg(parentproc);
int chars = readlink(procparent.ascii(), parentexecutable, sizeof(parentexecutable));
parentexecutable[chars] = 0;
parentexecutable[8191] = 0;
procparent = parentexecutable;
#ifdef DEBUG
printf("Parent executable name and full path is: %s\n\r", procparent.ascii());
#endif
TQString tdeBinaryPath = TQString(KDE_BINDIR "/");
#ifdef DEBUG
printf("The TDE binary path is: %s\n\r", tdeBinaryPath.ascii());
#endif
if (!procparent.startsWith(tdeBinaryPath)) {
printf("Unauthorized path detected in calling process\n\r");
return 2;
}
else {
procparent = procparent.mid(tdeBinaryPath.length());
#ifdef DEBUG
printf("Parent executable name is: %s\n\r", procparent.ascii());
#endif
if ((procparent == "ksmserver") || (procparent == "kdesktop_lock") || (procparent == "kdm")) {
// OK, the calling process is authorized to retrieve SAK data
// First, flush the buffer
mPipe_fd = open(FIFO_FILE, O_RDWR | O_NONBLOCK);
numread = 1;
while (numread > 0) {
numread = read(mPipe_fd, readbuf, 128);
}
// Now wait for SAK press
mPipe_fd = open(FIFO_FILE, O_RDWR);
if (mPipe_fd > -1) {
numread = read(mPipe_fd, readbuf, 128);
readbuf[numread] = 0;
readbuf[127] = 0;
close(mPipe_fd);
if (strcmp(readbuf, "SAK\n\r") == 0) {
return 0;
}
else {
return 1;
}
}
}
else {
printf("Unauthorized calling process detected\n\r");
return 3;
}
}
return 4;
}
|
